How to Check if Your PC Supports Miracast Using DirectX Diagnostic Tool

Press Win + R to open the Run dialog. Type dxdiag in the Run box, then click OK.

Step 2: In the System tab, click Save all information button to save all the collected information to a text file.

Step 3: Then you can open the DxDiag.txt file you saved, and scroll down towards the bottom of the System Information section at the top to see what it reports for Miracast to see if it's supported or not.